Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee43ef9fad15906f…

MALICIOUS

PDF

349.1 KB Created: 2015-08-21 09:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e030073370b35e3b4aea8362f409a5f5 SHA-1: 6a88d50d67ed47a0f314141c7ee338e084a90734 SHA-256: ee43ef9fad15906f68b504730378f8f6c9e30271d82f3775bfef04a3104da8db
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://botcraftman.ru/?lip&keyword=star+stable+online+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654689_skachat_igru_metro_2034_cherez_torrent_besplatno_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654688_esli_s_rebenkom_trudno_petranovskaya_skachat_fb2.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052623.bin
8b71b8ca11bb26ba3204460c208614b3d0d30f53ba6811e37370c1983ce022ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52623 9932 bytes
font_01_sfnt_off000541db.bin
48ee6c98c99ef645bdba396e909a297f6605da0078b43adef31f963af11fde2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x541DB 16536 bytes

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